Question

va rog azutor ex 5si 6 ajutor

Answer 1

5)(257.813+147.280)-(257.813-147.280)=405.093-110.553=294.540

6)
a+b+c=389.820    prima relatie
a+b=210.860        a II relatie
b+c=290.544        a III relatie
inlocuim a doua relatie in prima relatie si rezulta
210.860+c=389.820
c=389.820-210.860
c=178.960
inlocuim pe c in a treia relatie si rezulta
b+178.960=290.544
b=290.544-178.960
b=111.584
inlocuim pe b in a II relatie si rezulta
a+111.584=210.860
a=210.860-111584
a=99.276

verificare
99.276+111.584+178.960=389.820

Answer 2

ex.5
(257813+147280)-(257813-147280)=405093-110553=294540
ex.6
a+b+c=389820
a+b=210866
b+c=290544
in loc de a+b in prima expresie punem 210866 rezulta
210866+c=389820  rezulta  c=389820-210866  c=178954
in loc de b+c punem 290544
a+290544=389820   a=389820-290544 a=99276
99276+b+178954=389820    b=389820-99276-178954    b=111590